Module: Recursive Upward Processing
(c) 2001 by O.Conrad
Menu: Terrain Analysis > Hydrology > Catchment Area
Description
Recursive upward processing of cells for calculation of flow accumulation and related parameters. This set of algorithms processes recursively all upwards connected cells until each cell of the DEM has been processed.
References:
Deterministic 8
- O'Callaghan, J.F. / Mark, D.M. (1984):
'The extraction of drainage networks from digital elevation data',
Computer Vision, Graphics and Image Processing, 28:323-344
Rho 8:
- Fairfield, J. / Leymarie, P. (1991):
'Drainage networks from grid digital elevation models',
Water Resources Research, 27:709-717
Deterministic Infinity:
- Tarboton, D.G. (1997):
'A new method for the determination of flow directions and upslope areas in grid digital elevation models',
Water Ressources Research, Vol.33, No.2, p.309-319
Multiple Flow Direction:
- Freeman, G.T. (1991):
'Calculating catchment area with divergent flow based on a regular grid',
Computers and Geosciences, 17:413-22
- Quinn, P.F. / Beven, K.J. / Chevallier, P. / Planchon, O. (1991):
'The prediction of hillslope flow paths for distributed hydrological modelling using digital terrain models',
Hydrological Processes, 5:59-79
Parameters
Name | Type | Identifier | Description | Constraints |
---|
Input |
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Elevation | Grid (input) | ELEVATION | | |
Sink Routes (*) | Grid (optional input) | SINKROUTE | | |
Weight (*) | Grid (optional input) | WEIGHT | | |
Target Areas (*) | Grid (optional input) | TARGETS | | |
Output |
---|
Catchment Area | Grid (output) | CAREA | | |
Catchment Height (*) | Grid (optional output) | CHEIGHT | | |
Catchment Slope (*) | Grid (optional output) | CSLOPE | | |
Flow Path Length (*) | Grid (optional output) | FLOWLEN | | |
Options |
---|
Step | Integer | STEP | | Minimum: 1.000000 |
Method | Choice | Method | | Available Choices: [0] Deterministic 8 [1] Rho 8 [2] Deterministic Infinity [3] Multiple Flow Direction |
Convergence | Floating point | CONVERGENCE | Convergence factor for Multiple Flow Direction Algorithm (Freeman 1991) | |
(*) optional